Yes, granite worktops should generally be sealed. Granite is a natural stone, and although it is highly durable and resistant to many types of damage, it is still porous to some extent. Sealing the granite helps to protect it from absorbing liquids and stains, which can occur if spills are not cleaned up immediately.
Sealing the granite worktop creates a protective barrier on the surface, preventing liquids and oils from penetrating the stone. This is particularly important for light-colored or more porous granite varieties, as they are more susceptible to staining.
The frequency of sealing depends on the specific granite and the type of sealant used. In some cases, the worktop may need resealing every year or two, while in others, it may last longer. It's essential to follow the manufacturer's guidelines and recommendations for sealing, and you can also consult with the installer or a professional stone care expert for advice on the appropriate sealant and sealing schedule.
Regular maintenance, such as cleaning up spills promptly and using a mild soap and water solution for cleaning, will also help keep your granite worktop looking beautiful and in good condition for many years.